make sure rustc_driver links to an unwinder

Fixes #76020

Signed-off-by: Marc-Antoine Perennou <[email protected]>

Author: Keruspe

Cargo.lock

@@ -3556,6 +3556,7 @@ dependencies = [
  "tracing",
  "tracing-subscriber",
  "tracing-tree",
+ "unwind",
  "winapi 0.3.9",
 ]
 
@@ -5279,8 +5280,8 @@ dependencies = [
  "cc",
  "cfg-if",
  "compiler_builtins",
- "core",
  "libc",
+ "rustc-std-workspace-core",
 ]
 
 [[package]]

compiler/rustc_driver/Cargo.toml

@@ -34,6 +34,9 @@ rustc_serialize = { path = "../rustc_serialize" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_span = { path = "../rustc_span" }
 
+# Make sure we link to an unwinder
+unwind = { path = "../../library/unwind" }
+
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = ["consoleapi", "debugapi", "processenv"] }
 

compiler/rustc_driver/src/lib.rs

@@ -7,11 +7,16 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(nll)]
 #![feature(once_cell)]
+#![feature(panic_unwind)]
 #![recursion_limit = "256"]
 
 #[macro_use]
 extern crate tracing;
 
+// This is here just to make sure we link to an unwinder
+#[allow(unused_extern_crates)]
+extern crate unwind;
+
 pub extern crate rustc_plugin_impl as plugin;
 
 use rustc_ast as ast;

library/std/Cargo.toml

@@ -19,7 +19,7 @@ core = { path = "../core" }
 libc = { version = "0.2.79", default-features = false, features = ['rustc-dep-of-std'] }
 compiler_builtins = { version = "0.1.35" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
-unwind = { path = "../unwind" }
+unwind = { path = "../unwind", features = ['rustc-dep-of-std'] }
 hashbrown = { version = "0.9.0", default-features = false, features = ['rustc-dep-of-std'] }
 
 # Dependencies of the `backtrace` crate

library/unwind/Cargo.toml

@@ -13,13 +13,14 @@ bench = false
 doc = false
 
 [dependencies]
-core = { path = "../core" }
-libc = { version = "0.2.79", features = ['rustc-dep-of-std'], default-features = false }
-compiler_builtins = "0.1.0"
+core = { version = '1.0.0', optional = true, package = 'rustc-std-workspace-core' }
+libc = { version = "0.2.79", default-features = false }
+compiler_builtins = { version = "0.1.0", optional = true }
 cfg-if = "0.1.8"
 
 [build-dependencies]
 cc = { version = "1.0.1" }
 
 [features]
 llvm-libunwind = []
+rustc-dep-of-std = ['compiler_builtins', 'core', 'libc/rustc-dep-of-std']